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Estimated doorstep delivery by 7 Nov - 9 Nov from USA
Secure Your Building with 4-Hour Fire Protection
3M Fire Barrier Sealant CP 25WB+ is a high-performance, one-component, latex-based, intumescent sealant designed for through-penetration firestop applications. It dries to form a monolithic firestop seal, controlling the spread of fire, smoke, and noxious gases for up to 4 hours when installed correctly. This sealant also acts as a barrier to airborne sound transmission, with an STC rating of 54 when tested in a suitable wall assembly.
This sag-resistant, water-based sealant offers strong adhesion to a wide range of construction substrates and penetrants. Applied with conventional caulking equipment, it requires no mixing and is paintable, re-enterable, and repairable, ensuring easy application and clean-up. It expands a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C).
For industrial/occupational use only. Imported from authorized US retailers and authorized brand partners, all customs duties and GST are included in the listed price. Delivery via ExpressBox tracked service. Check local building codes for specific application requirements.
Trusted Firestop Science
3M Fire Barrier Sealant CP 25WB+ leverages advanced intumescent technology, expanding significantly when exposed to heat to create a robust seal. This USA-sourced sealant is formulated to control fire, smoke, and toxic gas spread, offering reliable protection tested to rigorous ASTM E814 (UL 1479) standards. Unlike generic fillers, its specific chemical composition ensures long-term performance and adhesion to diverse construction materials, providing peace of mind for critical safety applications.
Ideal For Professional & Industrial Use
This sealant is best suited for industrial/occupational use in through-penetration firestop applications, such as sealing around pipes, cables, and HVAC ducts in fire-rated walls and floors. It is not intended for consumer sale or use. If you require a general-purpose sealant for non-fire-rated applications or consumer DIY projects, a standard silicone or acrylic caulk would be more appropriate. Ensure compatibility with your specific building codes and assembly requirements.
Typical situations where 3M Fire Barrier Sealant CP 25WB+ 300ml (10.1 fl oz) | Tested to 4-Hour Fire Rating helps — illustrative scenarios, not customer reviews.
A construction project in Mumbai requires sealing cable penetrations through a fire-rated wall to meet building safety standards.
Using 3M Fire Barrier Sealant CP 25WB+ ensures up to 4 hours of fire and smoke protection, tested to UL 1479. Its intumescent property expands to seal gaps, preventing fire spread and meeting stringent safety requirements for critical infrastructure.
An architect in Delhi needs to install HVAC ducts through a fire-rated floor assembly and requires a sealant that also dampens noise.
This 3M sealant offers both firestopping (up to 4 hours) and sound dampening (STC 54). Its sag-resistant, gun-grade application is easy for contractors, and its paintable, repairable nature simplifies long-term building maintenance.
| Type | One-Component, Latex-Based, Intumescent |
| Halogen-Free | Yes |
| Scent | Unscented |
| Expansion Ratio | Minimum 3x dried volume |
| Application | Gun-grade, for through-penetrations and construction joints |
| Fire Rating | Up to 4 hours (ASTM E814 / UL 1479) |
| Sound Transmission Class (STC) | 54 (in STC 54-rated wall assembly) |
| Temperature Resistance | Expands above 1000°F (538°C) |
| Shelf life (unopened) | 900 days (approx. 30 months) |
| Cost per use | 300 ml cartridge at 1 ml/day = 300 days: ₹9.33 per day |
| Contraindications | Not for consumer sale or use; not for general-purpose sealing. |
| Allergens / Common Irritants | Contains lead (California Proposition 65 warning) |
| Feature | 3M Fire Barrier | Others |
|---|---|---|
| Fire Rating | Up to 4 hours (ASTM E814 / UL 1479) | Varies by brand; check for IS/NBC compliance and hour rating (e.g., 1-2 hours common) |
| Intumescent Property | Expands up to 3x volume in fire | May be intumescent or passive; expansion properties vary |
| Sound Barrier (STC) | STC 54 rating | Typically not specified or lower STC ratings |
| Application & Repair | Paintable, re-enterable, repairable, sag-resistant | Paintability and repairability vary; some may be difficult to re-enter |
| SKU | mgp1730 |
| GTIN | 00051115116384 |
| Brand | 3M |
| Model Name | CP 25WB+ |
| Color | Red |
| Item Form | Paste |
| Material | Latex-Based |
| Size | 300 ml (10.1 fl oz) Cartridge |
| Weight | 0.55 lb (0.25 kg) |
| Dimensions | 2 in x 12 in x 2 in (5 cm x 28.3 cm x 4.7 cm) |
| Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners |
About 3M
3M is a global leader in fire protection products, offering innovative solutions for industrial, commercial, and residential safety applications.
Compliance & Legal
No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging.
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This item:
3M Fire Barrier Sealant CP 25WB+ 300ml (10.1 fl oz) | Tested to 4-Hour Fire Rating
2,800
This item
3M Fire Barrier Sealant CP 25WB+ 300ml (10.1 fl oz) | Tested to 4-Hour Fire Rating
2,800
Total price:
36,210
You save 15,640 (30%) Extra3 items selected
3 items
36,210You save 15,640 (30%) Extra
| Attributes |  |  |  |  |  |  | |
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 2,800 3,870 | 29,880 42,530 | 3,530 5,450 | 1,730 2,760 | 2,310 3,930 | 1,950 3,120 | 4,340 5,930 |
| Brand Name | 3M | 3M | Quartet | uxcell | ALKOO | SmartSign | GORILLA |
| Item Form | Paste | N/A | N/A | N/A | N/A | N/A | N/A |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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